Tobacco composition

ABSTRACT

A tobacco composition including tobacco material and an aerosol former material. The tobacco material includes a leaf tobacco having sugars and nicotine in a weight ratio of between about 8:1 and about 20:1, wherein said leaf tobacco having sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 is present in the tobacco material in an amount of at least 5% by weight of the tobacco material.

PRIORITY CLAIM

The present application is a National Phase entry of PCT Application No. PCT/GB2020/053105, filed Dec. 3, 2020, which claims priority from GB Application No. 1917917.5, filed Dec. 6, 2019, and GB Application No. 2012051.5, filed Aug. 3, 2020 and GB Application No. 2012049.9, filed Aug. 3, 2020, each of which is hereby fully incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to tobacco compositions and combustible and non-combustible aerosol provision systems comprising tobacco compositions.

BACKGROUND

Tobacco compositions are used in combustible and non-combustible aerosol provision systems. Tobacco compositions typically include tobacco-containing material and may optionally include other non-tobacco materials.

SUMMARY

According to an aspect of the disclosure, there is provided a tobacco composition comprising tobacco material and an aerosol former material, wherein the tobacco material comprises a leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1, wherein said leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 is present in the tobacco material in an amount of at least 5% by weight of the tobacco material.

In some embodiments, the tobacco composition comprises nicotine in an amount of between about 1% and about 2.5% by weight of the tobacco composition.

In some embodiments, the weight ratio of the sugars to nicotine in the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 is between about 10:1 and about 15:1.

In some embodiments, the tobacco material comprises the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 in an amount of between about 30% and about 50% by weight of the tobacco material.

In some embodiments, the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 comprises the sugars in an amount of between about 5% and about 20% by weight of the leaf tobacco material.

In some embodiments, the tobacco composition comprises the aerosol-former material in an amount of between about 1% and about 10% by weight of the tobacco composition.

In some embodiments, the tobacco composition comprises the tobacco material in an amount of between about 20% and about 90% of the tobacco composition.

In some embodiments, the tobacco composition comprises the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 in an amount of between about 10% and about 60% by weight of the tobacco composition.

In some embodiments, the tobacco composition comprises an aerosolizable material.

In some embodiments, the tobacco composition comprises the aerosolizable material in an amount of between about 30% and about 45% by weight of the tobacco composition.

In some embodiments, the aerosolizable material comprises a binder.

In some embodiments, the aerosolizable material comprises inorganic material.

According to a further aspect of the disclosure, there is provided a tobacco composition comprising a tobacco material and an aerosolizable material, wherein the aerosolizable material comprises an inorganic material, a binder and an aerosol-former material and wherein the tobacco composition comprises the aerosolizable material in an amount of between about 30% and about 45% by weight of the tobacco composition.

In some embodiments, the aerosolizable material comprises the aerosol-former material in an amount of between about 10% and about 20% by weight of the aerosolizable material.

In some embodiments, the tobacco composition comprises the aerosolizable material an amount of between about 35% and about 40% by weight of the tobacco composition.

In some embodiments, the aerosolizable material comprises the inorganic material in an amount of at least about 50% by weight of the aerosolizable material.

In some embodiments, the aerosolizable material comprises the binder in an amount of at least about 5% by weight of the aerosolizable material.

In some embodiments, the aerosol-former material is selected from the group consisting of: glycerol, sorbitol, propylene glycol, triethylene glycol, lactic acid, diacetin, triacetin, triethylene glycol diacetate, triethyl citrate, ethyl myristate, isopropyl myristate, methyl stearate, dimethyl dodecanedioate, dimethyl tetradecanedioate, and mixtures thereof.

In some embodiments, the tobacco material comprises dry ice expanded tobacco material.

In some embodiments, the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 is lower-stalk leaf tobacco.

In some embodiments, the tobacco material and/or the aerosolizable material is shredded and has a width of between about 0.01 and 1.5 mm.

In some embodiments, the aerosolizable material does not comprise additional colorants.

According to a further aspect of the disclosure, there is provided a process of manufacturing a tobacco composition comprising: forming a slurry comprising the inorganic material, the binder and an aerosol-former material; drying the slurry to form the aerosolizable material; shredding the aerosolizable material to form a shredded aerosolizable material; and combining the shredded aerosolizable material with the tobacco material.

According to a further aspect of the disclosure, there is provided a delivery device comprising a tobacco composition.

According to a further aspect of the disclosure, a use of a tobacco composition is provided.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

FIGS. 1 to 3 are schematic views of delivery systems.

DETAILED DESCRIPTION OF THE DRAWINGS

Tobacco compositions can be used in delivery systems, including combustible and non-combustible aerosol provision systems. Tobacco compositions can include non-tobacco materials as well as tobacco material.

As used herein, the term “delivery system” is intended to encompass systems that deliver at least one substance to a user, and includes:

combustible aerosol provision systems, such as cigarettes, cigarillos, cigars, and tobacco for pipes or for roll-your-own or for make-your-own cigarettes (whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, tobacco substitutes or other smokable material);

non-combustible aerosol provision systems that release compounds from an aerosol-generating material without combusting the aerosol-generating material, such as electronic cigarettes, tobacco heating products, and hybrid systems to generate aerosol using a combination of aerosol-generating materials;

aerosol-free delivery systems that deliver the at least one substance to a user orally, nasally, transdermally or in another way without forming an aerosol, including but not limited to, lozenges, gums, patches, articles comprising inhalable powders, and oral products such as oral tobacco which includes snus or moist snuff, wherein the at least one substance may or may not comprise nicotine.

According to the present disclosure, a “combustible” aerosol provision system is one where a constituent aerosol-generating material of the aerosol provision system (or component thereof) is combusted or burned during use in order to facilitate delivery of at least one substance to a user.

In some embodiments, the delivery system is a combustible aerosol provision system, such as a system selected from the group consisting of a cigarette, a cigarillo and a cigar.

In some embodiments, the disclosure relates to a component for use in a combustible aerosol provision system, such as a filter, a filter rod, a filter segment, a tobacco rod, a spill, an aerosol-modifying agent release component such as a capsule, a thread, or a bead, or a paper such as a plug wrap, a tipping paper or a cigarette paper.

According to the present disclosure, a “non-combustible” aerosol provision system is one where a constituent aerosol-generating material of the aerosol provision system (or component thereof) is not combusted or burned in order to facilitate delivery of at least one substance to a user.

In some embodiments, the delivery system is a non-combustible aerosol provision system, such as a powered non-combustible aerosol provision system.

In some embodiments, the non-combustible aerosol provision system is an electronic cigarette, also known as a vaping device or electronic nicotine delivery system (END), although it is noted that the presence of nicotine in the aerosol-generating material is not a requirement.

In some embodiments, the non-combustible aerosol provision system is an aerosol-generating material heating system, also known as a heat-not-burn system. An example of such a system is a tobacco heating system.

In some embodiments, the non-combustible aerosol provision system is a hybrid system to generate aerosol using a combination of aerosol-generating materials, one or a plurality of which may be heated. Each of the aerosol-generating materials may be, for example, in the form of a solid, liquid or gel and may or may not contain nicotine. In some embodiments, the hybrid system comprises a liquid or gel aerosol-generating material and a solid aerosol-generating material. The solid aerosol-generating material may comprise, for example, tobacco or a non-tobacco product.

Typically, the non-combustible aerosol provision system may comprise a non-combustible aerosol provision device and a consumable for use with the non-combustible aerosol provision device.

In some embodiments, the disclosure relates to consumables comprising aerosol-generating material and configured to be used with non-combustible aerosol provision devices. These consumables are sometimes referred to as articles throughout the disclosure.

In some embodiments, the non-combustible aerosol provision system, such as a non-combustible aerosol provision device thereof, may comprise a power source and a controller. The power source may, for example, be an electric power source or an exothermic power source. In some embodiments, the exothermic power source comprises a carbon substrate which may be energized so as to distribute power in the form of heat to an aerosol-generating material or to a heat transfer material in proximity to the exothermic power source.

In some embodiments, the non-combustible aerosol provision system may comprise an area for receiving the consumable, an aerosol generator, an aerosol generation area, a housing, a mouthpiece, a filter and/or an aerosol-modifying agent.

In some embodiments, the consumable for use with the non-combustible aerosol provision device may comprise aerosol-generating material, an aerosol-generating material storage area, an aerosol-generating material transfer component, an aerosol generator, an aerosol generation area, a housing, a wrapper, a filter, a mouthpiece, and/or an aerosol-modifying agent.

In some embodiments, the delivery system is an aerosol-free delivery system that delivers at least one substance to a user orally, nasally, transdermally or in another way without forming an aerosol, including but not limited to, lozenges, gums, patches, articles comprising inhalable powders, and oral products such as oral tobacco which includes snus or moist snuff.

Tobacco plants comprise a stem and tobacco leaves. During growth, a tobacco plant produces a wide variety of chemical compounds, including carbohydrate species (such as sugars and starch) and nicotine. Sugars are also produced during the curing of some varieties of tobacco plant.

As used herein, the terms “sugar” and “sugars” are intended to cover total sugars, including reducing sugars (e.g. glucose and fructose) and non-reducing sugars (e.g. starch).

The ratio of sugars to nicotine varies throughout the tobacco plant. The sugar to nicotine ratio in the leaves generally decreases from the leaves in the lower regions of the plant to the leaves in the higher regions of the plant. Thus, the leaves of the lower portion of the tobacco plant (for example, the lower half of the plant) comprise a relatively high ratio of sugars to nicotine compared with the leaves in the upper region (e.g. the top third) of the tobacco plant. The youngest tobacco leaves are found in the upper region of the tobacco plant, whilst the oldest tobacco leaves are found in the lower region of the tobacco plant. Typically, the leaves at the lower half of the tobacco plant contain less sugar than the leaves at the top half of the tobacco plant because sugars in the bottom half of the plant are transported to the leaves in the top half of the plant to aid growth and flowering.

The sugar to nicotine ratio and the overall sugar content of the tobacco material has an effect on the organoleptic properties of the tobacco material when it is aerosolized in an aerosol provision system. For example, the sugars can be converted into other compounds that exhibit desirable organoleptic properties during processing of the tobacco material.

Although it is desirable for the tobacco material to contain sugars, a relatively high sugar to nicotine content can lead to a “harsh” flavor and/or irritation when smoked, which may be undesirable. As a result, lower-stalk and mid-stalk leaves, which comprise a relatively high sugar to nicotine ratio, conventionally constitute a minor component (less than 5 wt %) of conventional tobacco compositions that are used in combustible aerosol provision systems.

As used herein, the term “tobacco material” refers to a material derived from a plant of the Nicotiana species. The selection of the plant of the Nicotiana species is not limited, and the types of tobacco or tobaccos used may vary.

In some embodiments, the tobacco material is selected from flue-cured or Virginia, Burley, sun-cured, Maryland, dark-fired, dark air cured, light air cured, Indian air cured, Red Russian and Rustica tobaccos, and mixtures thereof, as well as various other rare or specialty tobaccos, green or cured. Tobacco material produced via any other type of tobacco treatment which could modify the tobacco taste, such as fermented tobacco or genetic modification or crossbreeding techniques, is also within the scope of the present disclosure. For example, it is envisaged that tobacco plants may be genetically engineered or crossbred to increase or decrease production of components, characteristics or attributes.

In some embodiments, the tobacco material is sun-cured tobacco, selected from Indian Kurnool and Oriental tobaccos, including Izmir, Basma, Samsun, Katerini, Prelip, Komotini, Xanthi and Yambol tobaccos. In some embodiments, the tobacco material is dark air cured tobacco, selected from Passanda, Cubano, Jatin and Besuki tobaccos. In some embodiments, the tobacco material is light air cured tobacco, selected from North Wisconsin and Galpao tobaccos.

In some embodiments, the tobacco material is a cured or non-cured mixture of flue-cured, Burley and Oriental tobaccos.

In some embodiments, the tobacco material is selected from Brazilian tobaccos, including Mata Fina and Bahia tobaccos. In some embodiments, the tobacco material is selected from criollo, Piloto Cubano, Olor, Green River, Isabela DAC, White Pata, Eluru, Jatim, Madura, Kasturi, Connecticut Seed, Broad Leaf, Connecticut, Pennsylvanian, Italian dry air cured, Paraguayan dry air cured and One Sucker tobaccos.

For the preparation of smoking/vaping or smokeless tobacco products, plants of the Nicotiana species may be subjected to a curing process. Certain types of tobaccos may be subjected to alternative types of curing processes, such as fire curing or sun curing. Preferably, but not necessarily, harvested tobaccos that are cured are aged.

The tobacco can be harvested in different stages of growth, for example when the plant is has reached a level of maturity and the lower leaves are ready for harvest whilst the upper leaves are still in development.

In some embodiments, at least one portion of the plant of the Nicotiana species (e.g., at least a portion of the tobacco material) is employed in an immature form. That is, in some embodiments, the plant, or at least one portion of that plant, is harvested before reaching a stage normally regarded as ripe or mature.

In some embodiments, at least a portion of the plant of the Nicotiana species (e.g. at least a portion of the tobacco material) is employed in a mature form. That is, in some embodiments, the plant, or at least one portion of that plant, is harvested when that plant (or plant portion) reaches a point that is traditionally viewed as being ripe, over-ripe or mature, which can be accomplished through the use of tobacco harvesting techniques conventionally employed by farmers. Both Oriental tobacco and Burley tobacco plants can be harvested. Also, the Virginia tobacco leaves can be harvested or primed depending upon their stalk position.

The Nicotiana species may be selected for the content of various compounds that are present in the plant. For example, plants may be selected on the basis that those plants produce relatively high quantities of one or more of the compounds desired to be isolated (i.e. the volatile compounds of interest). In certain embodiments, plants of the Nicotiana species are specifically cultivated for their abundance of leaf surface compounds. Tobacco plants may be grown in green-houses, growth chambers, or outdoors in fields, or grown hydroponically.

Various parts or portions of the plant of the Nicotiana species may be employed in the method defined herein. In some embodiments, the whole plant, or substantially the whole plant, is harvested and employed as such. As used herein, the term “substantially the whole plant” means that at least 90% of the plant is harvested, such as at least 95% of the plant, such as at least 99% of the plant. Alternatively, in some embodiments, various parts or pieces of the plant are harvested or separated for further use after harvest. In some embodiments, the tobacco material is selected from the leaves, stems, stalks of the plant, and various combinations of these parts. The tobacco material of the disclosure may thus comprise an entire plant or any portion of a plant of the Nicotiana species.

To achieve a desired flavor profile, tobacco compositions used in combustible aerosol provision systems, such as smoking articles, usually comprise a blend of tobacco materials obtained from different parts of the tobacco plant, tobacco materials obtained from different plants and tobacco materials that have been subjected to post-harvesting treatment.

The inventors of the present application have surprisingly found that tobacco material comprising lower-stalk leaf tobacco, that is to say, leaf tobacco having a weight ratio of sugars to nicotine of between about 8:1 and about 20:1, in an amount of greater than 5% by weight of the tobacco material, can be combined with an aerosol-former material to provide tobacco composition having excellent organoleptic properties when used in a combustible aerosol provision system. Not only that, as a result of the relatively high inclusion level of the lower-stalk leaf tobacco in the tobacco material, the resultant tobacco composition has a highly-desirable light color compared with conventional tobacco compositions.

The tobacco material can be a blend of different species of tobacco material and/or tobacco materials that have been treated according to tobacco treatment processes. The blend of tobacco material can be tailored to alter the organoleptic properties of the aerosol that is produced during use of the combustible aerosol provision system. For example, the relative amounts of different varieties of tobacco material in the composition can be tailored to alter the organoleptic properties of the composition.

In the compositions described herein, where amounts are given in % by weight, for the avoidance of doubt this refers to a dry weight basis, unless specifically indicated to the contrary. Thus, any water that may be present in the tobacco material, or in any component thereof, is entirely disregarded for the purposes of the determination of the weight %. The water content of the tobacco material described herein may vary and may be, for example, from 2 to 25% by weight. The water content of the tobacco material described herein may vary according to, for example, the temperature, pressure and humidity conditions at which the compositions are maintained. The water content can be determined by Karl-Fisher analysis, as known to those skilled in the art.

The tobacco composition can comprise the tobacco material in an amount of from about 20% to about 90% by weight of the tobacco composition. In some embodiments, the tobacco composition comprises the tobacco material in an amount of from about 30% to about 85%, from about 35% to about 80%, from about 40% to about 75% or from about 45% to about 70% by weight of the tobacco composition. In some embodiments, the tobacco composition comprises the tobacco material in an amount of from about 50% to about 70% by weight of the tobacco composition. For example, the tobacco composition may comprise the tobacco material in an amount of about 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69% or about 70% by weight of the tobacco composition.

The tobacco composition comprises leaf tobacco. The tobacco material can consist of leaf tobacco or it can comprise tobacco material obtained from other parts of the tobacco plant, such as tobacco stem. In some embodiments, the tobacco material is a blend comprising leaf tobacco and tobacco stem.

The leaf tobacco may be in whole leaf form. In some embodiments, the tobacco material comprises cured whole leaf tobacco. In some embodiments, the tobacco material substantially comprises cured whole leaf tobacco. In some embodiments, the tobacco material consists essentially of cured whole leaf tobacco.

The leaf tobacco may comprise sugar and nicotine in a range of weight ratios. The leaf tobacco comprises a leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1. It may also comprise leaf tobacco comprising sugars and nicotine in a weight ratio that is outside this range.

In some embodiments, the leaf tobacco comprises sugars and nicotine in a weight ratio (sugars: nicotine) of at least about 8:1, 9:1. 10:1, 11:1, 12:1, 13:1, 14:1, 15:1, 16:1, 17:1, 18:1 or 19:1. In some embodiments, the leaf tobacco comprises sugar and nicotine in a weight ratio (sugars: nicotine) of no more than about 20:1, 19:1, 18:1, 17:1, 16:1, 15:1, 14:1, 13:1, 12:1, 11:1, 10:1 or 9:1. The leaf tobacco material can comprise sugars and nicotine in a weight ratio of about 8:1, 9:1. 10:1, 11:1, 12:1, 13:1, 14:1, 15:1, 16:1, 17:1, 18:1, 19:1 or 20:1. In some embodiments, the weight ratio of sugars to nicotine in the leaf tobacco is between about 10:1 to about 15:1. In some embodiments, the weight ratio of sugars to nicotine in the leaf tobacco is about 9:1, 10: 1, 11:1 or about 12:1.

The tobacco material comprises the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 in an amount of at least about 5% by weight of the tobacco material. The tobacco material can comprise the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 in an amount of from about 5% to about 90% by weight of the tobacco material. In some embodiments, the tobacco material comprises the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 in an amount of from about 10% to about 80%, from about 15% to about 70%, from about 20% to about 60%, from about 25% to about 50% or from about 30% to about 45% by weight of the tobacco material. In some embodiments, the tobacco material comprises the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 in an amount of about 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44% or 45% by weight of the tobacco material.

The leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 is, in some embodiments, lower-stalk leaf tobacco. The leaf tobacco may be subjected to post-harvesting processing prior to incorporation into the tobacco composition. For example, the leaf tobacco may be subjected to one or more of curing (including flue-curing and air-curing), aging, fermentation or conditioning prior to inclusion in the tobacco composition.

The leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 may comprise a total sugar content of between about 5% and about 20% by weight of the leaf tobacco material. In some embodiments, the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 may comprise a total sugar content of between about 10% and about 14% by weight of the leaf tobacco material. In some embodiments, the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 comprises a total sugar content of between about 12% and about 14% by weight of the tobacco composition.

In some embodiments, the tobacco material comprises stem tobacco material. The tobacco material may comprise at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, or at least 95% stem tobacco material.

In some embodiments, the tobacco composition comprises reconstituted tobacco in an amount of between about 0% to about 90% by weight of the composition. In some embodiments, the tobacco composition comprises paper reconstituted tobacco in an amount of from 10% to 90%, 10% to 80% or 20% to 70% by weight of the composition. In some embodiments, the tobacco composition comprises reconstituted tobacco in an amount of between about 1% and about 20%, between about 2% and about 15% or between about 3% and about 10%.

The tobacco composition may comprise nicotine in an amount of from about 0.5% to about 3%, from about 0.6% to about 2.9%, from about 0.7% to about 2.8%, from about 0.8% to about 2.7%, from about 0.9% to about 2.6% by weight of the tobacco composition. In some embodiments, the nicotine content of the tobacco composition is from about 1% to about 2.5%, from about 1.1% to about 2.4%, from about 1.2% to about 2.3%, from about 1.3% to about 2.2% or from about 1.4% to about 2.1% by weight of the tobacco composition. In some embodiments, the nicotine content of the tobacco composition is from about 1.8 to about 2% by weight of the tobacco composition. In some embodiments, the nicotine content of the tobacco composition is about 1.8%, 1.9% or 2% by weight of the tobacco composition.

The tobacco composition comprises an aerosol-former material. Without wishing to be bound by theory, it is speculated that the combination of the leaf tobacco having a high amount of sugar relative to nicotine (between 8:1 and about 20:1) with the aerosol-former material provides a tobacco composition having superior organoleptic properties and a smoother taste.

The aerosol-former material is present in an amount of between about 1% and about 10% by weight of the tobacco composition.

The aerosol-former material may comprise one or more constituents capable of forming an aerosol. In some embodiments, the aerosol-former material may comprise one or more of glycerine, glycerol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,3-butylene glycol, erythritol, meso-Erythritol, ethyl vanillate, ethyl laurate, a diethyl suberate, triethyl citrate, triacetin, a diacetin mixture, benzyl benzoate, benzyl phenyl acetate, tributyrin, lauryl acetate, lauric acid, myristic acid, sorbitol and propylene carbonate. Combinations of aerosol-former materials may also be used. For example, the aerosol-former may comprise a combination of glycerol and propylene glycol.

The aerosol-former material can be combined with the tobacco material by any suitable means. For example, the tobacco material can be mixed with the aerosol-former material or the aerosol-former material can be sprayed onto the tobacco material. Alternatively, an aerosolizable material comprising the aerosol-former material may be combined with the tobacco material.

The tobacco material may be shredded tobacco material. The cut width of the shredded tobacco material may be from about 0.5 cuts per mm to about 2.5 cuts per mm. In some embodiments, the cut width of the shredded tobacco material is from about 0.8 to about 1.8 or from about 0.9 to about 1.7 cuts per mm. In some embodiments, the cut width of the shredded tobacco material is between about 1.4 and about 1.6 cuts per mm, or about 1.45 cuts per mm, or about 37 cuts per inch.

In some embodiments, the tobacco material comprises an expanded tobacco material. In some embodiments, the tobacco material comprises dry ice expanded tobacco (DIET) material and/or expanded stem tobacco. In some embodiments, the tobacco material consists of DIET material. DIET material can be present in an amount of about 5%, 10%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100%. In some embodiments, DIET is present in an amount of between about 5% and about 50% by weight of the tobacco material.

In some embodiments, DIET is present in an amount of from about 5% to about 30%, from about 10% to about 20% or from about 10% to about 15%.

Advantageously, where the delivery system is a combustible aerosol provision system, the DIET material may improve the combustion characteristics of the combustible aerosol provision system. For example, it may increase the rate of combustion or reduce the chances of combustion becoming extinguished. Furthermore, DIET typically has a higher fill value than leaf tobacco. This means that, for a given volume, a tobacco composition comprising DIET may weigh less than a tobacco composition without DIET. The inclusion of DIET in the composition may therefore lower the overall weight of the tobacco composition and thus reduce transportation costs.

The term “fill value” is a measure of the ability of a material to occupy a specific volume at a given moisture content. A high fill value indicates that a lower weight of material is required to produce a rod at acceptable hardness/firmness levels of a given circumference, volume and length than is required with a material of lower fill value.

In a further embodiment, the tobacco composition comprises an aerosolizable material. The tobacco composition may comprise the aerosolizable material in any suitable amount. For example, the tobacco composition may comprise the aerosolizable material in an amount of between about 1% and about 99%, between about 1% and about 50% or between about 30% and about 45% by weight of the tobacco composition. In some embodiments, the tobacco composition comprises the aerosolizable material in an amount of from about 1%, about 2%, about 3%, about 4%, about 5%, about 6%, about 7%, about 8%, about 9% or about 10% up to about 90%, about 80%, about 70%, about 60%, about 50%, about 40%, about 30%, about 20% by weight of the tobacco composition.

In some embodiments, the tobacco composition comprises the aerosolizable material in an amount of about 3%, 4%, 5%, about 6%, about 7%, about 8%, about 9%, about 10%, about 11%, about 12%, about 13%, about 14%, about 15%, about 16%, about 17%, about 18%, about 19%, about 20%, about 21%, about 22%, about 23%, about 24%, about 25%, about 26%, about 27%, about 28%, about 29%, about 30%, about 31%, about 32%, about 33%, about 34%, about 35%, about 36%, about 37%, about 38%, about 39%, about 40%, about 41%, about 42%, about 43%, about 44% or about 45% by weight of the tobacco composition.

In some embodiments, the tobacco composition comprises the aerosolizable material in an amount of from about 1% to about 10%. In some embodiments, the tobacco composition comprises the aerosolizable material in an amount of from about 5% to about 60%, from about 6% to about 55%, from about 7% to about 50%, from about 8% to about 45%, from about 9% to about 40% or from about 10 to about 35% by weight of the tobacco composition.

The tobacco composition may comprise the aerosolizable material in an amount of from about 30% to about 45% by weight of the tobacco composition. In some embodiments, the tobacco composition comprises the aerosolizable material in an amount of from about 30% to about 40% by weight of the tobacco composition. In some embodiments, the aerosolizable material is present in an amount of from about 35% to about 40% by weight of the tobacco composition, or in an amount of 37% to 39% by weight of the tobacco composition or in an amount about 37.5% by weight of the tobacco composition.

The inventors have found that an article comprising a tobacco composition comprising a relatively high amount of the aerosolizable material (e.g. greater than about 20%) improves various sensory (e.g. organoleptic) properties, particularly the smoothness of the smoke that is produced when the article is smoked. In other words, the greater the amount of aerosolizable material, the smoother the flavor profile.

The inventors have also found that an article comprising a tobacco composition comprising relatively low amounts of the aerosolizable material (e.g. less than about 20%) not only provides a smooth flavor profile, but also enhances the flavor and taste of other components, in particular the flavor and taste of the tobacco material in the tobacco composition. Advantageously, this allows for varieties of tobacco which would conventionally be considered to have a desirable, but subtle, flavor profile to be used in the tobacco composition.

In some embodiments, the aerosolizable material is an amorphous solid.

The aerosolizable material may comprise the aerosol-former material, as described previously. The aerosolizable material may comprise the aerosol-former material in an amount of from about 1% to about 25% or from about 5% to about 20% by weight of the aerosolizable material. In some embodiments, the aerosolizable material is present in an amount of from 9% to about 16% by weight of the aerosolizable material, from about 10% to about 15% or from about 11% to about 14% or from about 12% to about 13% by weight of the aerosolizable material.

The aerosolizable material may comprise a binder. The binder can be one or more compounds selected from the group comprising alginates, pectins, starches (and derivatives), celluloses (and derivatives), gums, silica or silicones compounds, clays, polyvinyl alcohol and combinations thereof. For example, in some embodiments, the binder comprises one or more of alginates, pectins, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethylcellulose, pullulan, xanthan gum, guar gum, carrageenan, agarose, acacia gum, fumed silica, PDMS, sodium silicate, kaolin and polyvinyl alcohol. In some cases, the binder comprises alginate and/or pectin. In some embodiments, the binder comprises an alginate, such as sodium alginate.

The aerosolizable material may comprise the binder in an amount of from 1% to about 15% by weight of the aerosolizable material. In some embodiments, the binder is present in an amount of from about 5% to about 10% or about 7% to about 9% by weight of the aerosolizable material.

The aerosolizable material may comprise an inorganic material. The inorganic material can comprise or consist of one or more metal carbonates, such as calcium carbonate or magnesium carbonate. Alternatively, the inorganic material may be a mixture of a metal carbonate, such as magnesium carbonate or calcium carbonate, a metal oxide, such as calcium or magnesium oxide and/or a metal sulfate, such as calcium sulfate. The inorganic material may be a mineral that comprises one or more metal carbonates. In some embodiments, the inorganic material is chalk.

The aerosolizable may comprise the inorganic material in an amount of from about 50% to about 90%, from about 60% to about 85% or from about 75% to about 80% by weight of the aerosolizable material.

In some embodiments, the aerosolizable material comprises or consists of the aerosol-former material, the binder and the inorganic material. In some embodiments, the aerosolizable material comprises the aerosol-former material in an amount of from about 10 wt % to about 20 wt % based on the total weight of the aerosolizable material, the binder in an amount of from about 1 wt % to about 10 wt % based on the total weight of the aerosolizable material and the inorganic material in an amount of from about 75 wt % to about 85 wt % based on the total weight of the aerosolizable material.

The aerosolizable material may comprise any of the flavors described herein.

In some embodiments, the aerosolizable material comprises a tobacco extract. The tobacco extract may be prepared by any means that would be known to a person skilled in the art. The inclusion of a tobacco extract in the aerosolizable material may further enhance the flavor of the tobacco composition.

In some embodiments, the aerosolizable material does not comprise any colorants. Alternatively, the aerosolizable material may comprise a colorant. The colorant may alter the visual appearance of the aerosolizable material. The presence of colorant in the aerosolizable material may enhance the visual appearance of a tobacco composition comprising the aerosolizable material. For example, the aerosolizable material may be color-matched with a tobacco material such that it visually blends in with the tobacco material when the two materials are combined. The color of aerosolizable material may be white, green, blue, brown or black. In a preferred embodiment, the color of the aerosolizable material is white.

In some embodiments, the color of the tobacco composition may be tailored to achieve any desired color. For example, a material that is configured to alter the appearance of the tobacco composition, such as a colorant, may be applied to some or all of the tobacco composition. In some embodiments, the material configured to alter the appearance of the tobacco composition is applied to the tobacco material and/or the aerosolizable materials individually (e.g. prior to blending these material). The material configured to alter the appearance of the tobacco composition may be applied to the tobacco composition after or during the aerosolizable material and tobacco material are blended. The material configured to alter the appearance of the tobacco composition can be applied by spraying, for example.

The aerosolizable material can be combined with a tobacco material to form a tobacco composition. Optionally, the tobacco composition can comprise leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 in an amount of at least 5% by weight of the tobacco material.

The aerosolizable material can be formed as a sheet of material and then cut or shredded into separate individual segments or portions of material. The sheet of material and thus the shredded portions of material may have a thickness of about 0.015 mm to about 1.0 mm. Suitably, the thickness may be about 0.05 mm, 0.1 mm or 0.15 mm to about 0.5 mm or 0.3 mm. In some embodiments, the aerosolizable material may have a thickness of between about 0.45 mm and about 0.85 mm. The inventors have found that a material having a thickness of 0.5 mm is particularly suitable.

The aerosolizable material can be formed as a sheet of material and then shredded for inclusion in the tobacco composition.

The cut width of the shredded aerosolizable material tobacco material may be from about 0.5 cuts per mm to about 2.5 cuts per mm. In some embodiments, the cut width of the shredded aerosolizable material is from about 0.8 to about 1.8 or from about 0.9 to about 1.7 cuts per mm. In some embodiments, the cut width of the shredded aerosolizable material is between about 1.4 and about 1.6 cuts per mm, or about 1.45 cuts per mm, or about 37 cuts per inch.

The shredded aerosolizable material may have a cut width of from about 0.2 to about 1 cut per mm, from about 0.3 to about 0.9 cuts per mm, from about 0.4 to about 0.8 cuts per mm or from about 0.5 to about 0.7 cuts per mm.

The aerosolizable material may be manufactured by combining the aerosol-former material, the binder and the inorganic material with a solvent, such as water; casting the slurry on a heated band caster to produce a wet sheet; and drying the wet sheet to provide the aerosolizable material. The aerosolizable material may be further processed. For example, the aerosolizable material may be shredded.

The aerosolizable material does not exhibit undesirable organoleptic properties when heated or burnt. Thus, the tobacco composition exhibits a smooth and neutral flavor profile when smoked and does not emit overpowering or unpleasant flavors. Without wishing to be bound by theory, it is postulated that this may be due to the aerosolizable material having a diluting effect on the smoke stream.

In some embodiments, the tobacco composition comprises aflavor. The inventors have surprisingly found that the smooth and neutral flavor profile exhibited by the tobacco composition means that the flavor can be more readily perceived by the user. As such, less flavor may need to be added to the composition to achieve the desired flavor characteristics. Furthermore, owing to the relatively neutral organoleptic properties of the aerosol-generating material described, herein it may be possible to use flavors that are not traditionally used in, for example, cigarettes, such as flavors exhibiting a subtle taste and/or aroma.

In some embodiments, the tobacco composition comprises one or more flavors applied to the surface of the tobacco composition. The inventors have surprisingly found that, where the tobacco composition comprises a flavor, this flavor can be readily perceived by the user. As such, relatively small amounts of flavor may need to be added to the composition to achieve the desired flavor characteristics. For example, one or more flavors can be added to the aerosol-generating material and/or aerosolizable material in an amount of less than about 2000 ppm, for example about 100 ppm, 500 ppm, 1000 ppm, 1500 ppm. In some embodiments, the one or more flavors are added in an amount of between about 2000 ppm and about 12000 ppm, such as about 2000 ppm, 3000 ppm, 4000 ppm, 5000 ppm, 6000 ppm, 7000 ppm, 8000 ppm, 9000 ppm, 10000 or 11000 ppm.

Instead of, or in addition to, being applied to the surface of the tobacco composition, the flavor can be incorporated into the aerosolizable material. For example, the aerosolizable material may comprise an embedded flavor. The flavor may be added to the aerosolizable material during its manufacture. Advantageously, where the flavor is included in the aerosolizable material, it may release more slowly from the aerosolizable material compared with flavor that is included on the surface of the tobacco composition. This may extend the shelf-life of the tobacco composition and also the period over which flavor is released during smoking of the article.

The flavor can be added to the aerosolizable material in an amount of between about 0.01% to about 0.1% by weight of the aerosolizable material.

As used herein, the terms “flavor” and “flavorant” refer to materials which, where local regulations permit, may be used to create a desired taste, aroma or other somatosensorial sensation in a product for adult consumers. They may include naturally occurring flavor materials, botanicals, extracts of botanicals, synthetically obtained materials, or combinations thereof (e.g., tobacco, cannabis, licorice (liquorice), matcha, yuzu, cappuccino, cranberry, starfruit, hydrangea, eugenol, Japanese white bark magnolia leaf, chamomile, fenugreek, clove, maple, matcha, menthol, Japanese mint, aniseed (anise), cinnamon, turmeric, Indian spices, Asian spices, herb, wintergreen, cherry, berry, red berry, cranberry, peach, apple, orange, mango, clementine, lemon, lime, tropical fruit, papaya, rhubarb, grape, durian, dragon fruit, cucumber, blueberry, mulberry, citrus fruits, Drambuie, bourbon, scotch, whiskey, gin, tequila, rum, spearmint, peppermint, lavender, aloe vera, cardamom, celery, cascarilla, nutmeg, sandalwood, bergamot, geranium, khat, naswar, betel, shisha, pine, honey essence, rose oil, vanilla, lemon oil, orange oil, orange blossom, cherry blossom, cassia, caraway, cognac, jasmine, ylang-ylang, sage, fennel, wasabi, piment, ginger, coriander, coffee, hemp, a mint oil from any species of the genus Mentha, eucalyptus, star anise, cocoa, lemongrass, rooibos, flax, ginkgo biloba, hazel, hibiscus, laurel, mate, orange skin, rose, tea such as green tea or black tea, thyme, juniper, elderflower, basil, bay leaves, cumin, oregano, paprika, rosemary, saffron, lemon peel, mint, beefsteak plant, curcuma, cilantro, myrtle, cassis, valerian, pimento, mace, damien, marjoram, olive, lemon balm, lemon basil, chive, carvi, verbena, tarragon, limonene, thymol, camphene), flavour enhancers, bitterness receptor site blockers, sensorial receptor site activators or stimulators, sugars and/or sugar substitutes (e.g., sucralose, acesulfame potassium, aspartame, saccharine, cyclamates, lactose, sucrose, glucose, fructose, sorbitol, or mannitol), and other additives such as charcoal, chlorophyll, minerals, botanicals, or breath freshening agents. They may be imitation, synthetic or natural ingredients or blends thereof. They may be in any suitable form, for example, liquid such as an oil, solid such as a powder, or gas.

In some embodiments, the flavor comprises menthol, spearmint and/or peppermint. In some embodiments, the flavor comprises flavor components of cucumber, blueberry, citrus fruits and/or redberry. In one embodiment, the flavor is cappuccino. In some embodiments, the flavor comprises eugenol. In some embodiments, the flavor comprises flavor components extracted from tobacco. In some embodiments, the flavor comprises flavor components extracted from cannabis.

In some embodiments, the flavor may comprise a sensate, which is intended to achieve a somatosensorial sensation, which are usually chemically induced and perceived by the stimulation of the fifth cranial nerve (trigeminal nerve), in addition to or in place of aroma or taste nerves, and these may include agents providing heating, cooling, tingling, numbing effect. A suitable heat effect agent may be, but is not limited to, vanillyl ethyl ether and a suitable cooling agent may be, but not limited to eucolyptol, WS-3.

Where the tobacco composition comprises an aerosolizable material as, described herein, and a flavor or sensate, the aerosolizable material may enhance a user's perception of the flavor or sensate compared with tobacco compositions that do not comprise the aerosolizable material. Without wishing to be bound by theory, it is thought that the relatively neutral flavor properties of the aerosolizable material mean that it can act as a “flavor carrier” and enhance other flavors or sensates.

A consumable may comprise the tobacco composition. A consumable is an article comprising or consisting of aerosol-generating material, part or all of which is intended to be consumed during use by a user. A consumable may comprise one or more other components, such as an aerosol-generating material storage area, an aerosol-generating material transfer component, an aerosol generation area, a housing, a wrapper, a mouthpiece, a filter and/or an aerosol-modifying agent. A consumable may also comprise an aerosol generator, such as a heater, that emits heat to cause the aerosol-generating material to generate aerosol in use. The heater may, for example, comprise combustible material, a material heatable by electrical conduction, or a susceptor.

A susceptor is a material that is heatable by penetration with a varying magnetic field, such as an alternating magnetic field. The susceptor may be an electrically-conductive material, so that penetration thereof with a varying magnetic field causes induction heating of the heating material. The heating material may be magnetic material, so that penetration thereof with a varying magnetic field causes magnetic hysteresis heating of the heating material. The susceptor may be both electrically-conductive and magnetic, so that the susceptor is heatable by both heating mechanisms. The device that is configured to generate the varying magnetic field is referred to as a magnetic field generator, herein.

The consumable may be a combustible aerosol provision system comprising a tobacco composition as described herein. The consumable may alternatively be for use in a non-combustible aerosol-provision system.

FIG. 1 is a schematic illustration of a consumable la, which is generally cylindrical in shape. The delivery system includes a rod 2 comprising a tobacco composition as described herein and wrapped in a wrapping material 3, in this example cigarette paper, connected longitudinally to a filter 4 by tipping material 5 overlaying the filter 4 and partially overlaying the wrapping material 3 so as to connect the filter 4 to the rod 2. The filter comprises an absorbent material 7 and is wrapped in plug wrap 8.

A range of wrapping materials may be suitable for wrapping the tobacco composition. The wrapping material can have a variety of colors. In some embodiments, the color of the wrapping material may be selected so as to match or coordinate with the tobacco composition. The wrapping material may also be translucent, or transparent to enable the user to identify the tobacco composition within the consumable. For example, a tobacco composition may have a distinctive appearance, which is visible to a user through the transparent or translucent wrapper.

The tobacco composition may comprise tobacco material and aerosolizable material, as described herein. In some embodiments, the distribution of tobacco material and aerosolizable material in the rod 2 is homogenous. Alternatively, the distribution of tobacco material and aerosolizable material in the rod 2 is inhomogeneous. The concentration of the aerosolizable material in the tobacco composition can vary along the length of the rod 2. For example, the aerosolizable material may be present in a higher concentration nearer to the mouthpiece. This may improve the smoothness of the aerosol produced by the consumable towards the end of a session. Where the aerosolizable material comprises a flavor, the aerosol produced by the consumable towards the end of the session may have a particularly high concentration offlavor, thus altering (e.g. improving) the sensory properties of the consumable at the end of a session.

The axial region is a region, in the present example, centered on the axis ‘a’ of the delivery system la, having a radius of about 3 mm. In alternative embodiments, the radius of the axial region can be anywhere from 1 mm to 4 mm, or from 1 mm to 3 mm, or about 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm.

The axis of the delivery system la, about which the tobacco rod 2 and the filter 4 are aligned, is indicated as ‘a’ in FIG. 1 .

FIG. 2 is a schematic illustration of a combustible aerosol provision system 2 a.

Reference numerals are retained from the embodiment illustrated by FIG. 1 and as described previously.

A capsule 9 is provided in the filter 4. The capsule comprises an aerosol modifying agent which modifies properties of mainstream smoke passing through the smoking article 2. The capsule can be manufactured and inserted into the filter 4 using existing processes and machinery. In the present example, the capsule contains menthol flavorant, although other fluids or granular additives could be contained within the capsule.

The capsule 9 can be a breakable capsule, for instance a capsule which has a solid, frangible shell surrounding a liquid payload. The capsule can be ruptured by a consumer to release the fluid additive into the absorbent filter material 7. The capsule 9 is entirely embedded within the body of material 7. In other words, the capsule 9 is completely surrounded by the material forming the body 7.

In the present example, a single capsule 9 is used. In alternative embodiments, the filter 4 may comprise one or more capsules. In other examples, a plurality of breakable capsules may be disposed within the body of material 7, for instance two, three or more breakable capsules. The length of the body of material 7 can be increased to accommodate the number of capsules required. In examples where a plurality of capsules is used, the individual capsules may be the same as each other, or may differ from one another in terms of size and/or capsule payload.

In other examples, multiple bodies of material 7 may be provided, with each body containing one or more capsules.

The combustible aerosol provision system may comprise an aerosol-modifying agent. An aerosol-modifying agent is a substance, typically located downstream of the aerosol generation area, that is configured to modify the aerosol generated by the tobacco composition when it is heated, for example by changing the taste, flavor, acidity or another characteristic of the aerosol.

The aerosol-modifying agent may, for example, be an additive or a sorbent. The aerosol-modifying agent may, for example, comprise one or more of a flavors, a colorant, water, and a carbon adsorbent. The aerosol-modifying agent may, for example, be a solid, a liquid, or a gel. The aerosol-modifying agent may be in powder, thread or granule form. The aerosol-modifying agent may be free from filtration material.

Preferred aerosol-modifying agents are flavorants and sensates, as described previously.

As noted previously, the aerosol produced by the tobacco composition described herein exhibits relatively smooth and neutral organoleptic properties. The inventors have found that the tobacco composition does not tend to mask aerosol-modifying agents present in the aerosol. This means that the aerosol can act as a “carrier” for aerosol-modifying agents. Therefore, the organoleptic properties of the aerosol-modifying agent can be readily perceived by the user, lower quantities of aerosol-modifying agent may need to be added to the tobacco composition to achieve the desired aerosol characteristics and the aerosol produced by the tobacco composition can be used to carry a wide variety of different aerosol-modifying agents.

The aerosol-modifying agent is provided in or on an aerosol-modifying agent release component, which may be operable to selectively release the aerosol-modifying agent. The aerosol-modifying agent release component can be a capsule, a thread, or a bead, or a wrapper, such as a paper wrapper, a plug wrap, a tipping paper or a cigarette paper.

In some embodiments, the aerosol-modifying agent release component is a wrapper, in particular a tipping paper, comprising an aerosol-modifying agent. The tipping paper or any of the papers/wrappers described herein can comprise an aerosol-modifying agent, such as a sensate material.

In some embodiments, the sensate material may comprise one or more of pH regulators, stabilizers, and/or antioxidants. These materials may help to increase the shelf-life of the wrapper and thus the combustible aerosol provision system.

The aerosol-modifying agent can be encapsulated in an encapsulating material. For instance, the sensate material can be provided in the form of microcapsules which are applied to the tipping paper or other wrapper. Encapsulation of the aerosol-modifying agent may provide various advantages. For example, the encapsulated aerosol-modifying agent may comprise or consist of a flavorant having a desired taste or aroma. Encapsulation may enhance the longevity of the taste and/or aroma.

In particular, encapsulation of the aerosol-modifying agent may improve the longevity of the aroma of the aerosol-modifying agent by reinforcing the flavor detected by the user. Thus, the aroma may continue to be detected by a user even after the flavor has diminished (e.g. when the flavor is no longer detectable by the user or is less detectable by the consumer), thereby enhancing the user's experience.

The encapsulated aerosol-modifying agent may also help to mask other aromas that may be emitted by components of the combustible aerosol provision system before or during its use.

The encapsulated aerosol-modifying agent may exhibit an aroma that is indicative of the flavor of the aerosol-modifying agent. For example, the aroma may provide the user with a cue to the flavor of the sensate material. This may help the user to place the flavor of the sensate material rapidly.

In some embodiments, the aerosol-modifying agent release component is a capsule.

The capsule may have a core-shell structure. A core-shell structure comprises a shell encapsulating a liquid agent, for instance an aerosol-modifying agent as described herein. The shell of the capsule can be configured to be ruptured by a user to release the aerosol-modifying agent.

The delivery system may comprise an individual capsule or it may comprise more than one capsule.

The shell of the capsule can comprise an encapsulating material or a barrier material, which creates a shell around a core that comprises the aerosol modifying agent. The shell structure hinders migration of the aerosol-modifying agent during storage of the delivery system but allows controlled release of the aerosol modifying agent during use.

The barrier material (also referred to herein as the encapsulating material) is frangible. The capsule is crushed or otherwise fractured or broken by the user to release the encapsulated aerosol modifier. Typically, the capsule is broken immediately prior to heating being initiated but the user can select when to release the aerosol modifier. The term “breakable capsule” refers to a capsule, wherein the shell can be broken by means of a pressure to release the core; more specifically the shell can be ruptured under the pressure imposed by the user's fingers when the user wants to release the core of the capsule.

In some embodiments, the filter may comprise a capsule and a plurality of particles configured such that, in use, the particles promote breaking of the capsule upon the application of an external force to the wall of the tobacco industry product component by a user. The particles may be made from a material that is more robust (e.g. harder) than the capsule shell. This helps to promote breakage of the additive capsules upon the application of the external force. The particles being more robust also helps to prevent breakage of the capsules during transit. Suitable arrangements are described in WO 2019/207302.

In some cases, the barrier material is heat resistant. That is to say, in some cases, the barrier will not rupture, melt or otherwise fail at the temperature reached at the capsule site during operation of the aerosol provision device. Illustratively, a capsule located in a mouthpiece may be exposed to temperatures in the range of 30° C. to 100° C. for example, and the barrier material may continue to retain the liquid core up to at least about 50° C. to 120° C.

In other cases, the capsule releases the core composition on heating, for example by melting of the barrier material or by capsule swelling leading to rupture of the barrier material.

The capsule can be spherical and have a diameter of about 3 mm to about 3.5 mm. In other examples, other shapes and sizes of capsule can be used. For example, the capsule may have a diameter less than 4 mm, or less than 3.5 mm, or less than 3.25 mm. In alternative embodiments, the capsule may have a diameter greater than about 3.25 mm, for example greater than 3.5 mm, or greater than 4 mm.

The total weight of the capsule may be in the range of about 1 mg to about 100 mg, suitably about 5 mg to about 60 mg, about 8 mg to about 50 mg, about 10 mg to about 20 mg, or about 12 mg to about 18 mg.

The total weight of the core formulation may be in the range of about 2 mg to about 90 mg, suitably about 3 mg to about 70 mg, about 5 mg to about 25 mg, about 8 mg to about 20 mg, or about 10 mg to about 15 mg.

The barrier material may comprise one or more of a gelling agent, a bulking agent, a buffer, a coloring agent and a plasticizer. Suitably, the gelling agent may be, for example, a polysaccharide or cellulosic gelling agent, a gelatin, a gum, a gel, a wax or a mixture thereof. Suitable polysaccharides include alginates, dextrans, maltodextrins, cyclodextrins and pectins. Suitable alginates include, for instance, a salt of alginic acid, an esterified alginate or glyceryl alginate. Salts of alginic acid include ammonium alginate, triethanolamine alginate, and group I or II metal ion alginates like sodium, potassium, calcium and magnesium alginate. Esterified alginates include propylene glycol alginate and glyceryl alginate. In an embodiment, the barrier material is sodium alginate and/ or calcium alginate. Suitable cellulosic materials include methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, cellulose acetate and cellulose ethers. The gelling agent may comprise one or more modified starches. The gelling agent may comprise carrageenans. Suitable gums include agar, gellan gum, gum Arabic, pullulan gum, mannan gum, gum ghatti, gum tragacanth, Karaya, locust bean, acacia gum, guar, quince seed and xanthan gums. Suitable gels include agar, agarose, carrageenans, furoidan and furcellaran. Suitable waxes include carnauba wax. In some cases, the gelling agent may comprise carrageenans and/or gellan gum; these gelling agents are particularly suitable for inclusion as the gelling agent as the pressure required to break the resulting capsules is particularly suitable.

The barrier material may comprise one or more bulking agents, such as starches, modified starches (such as oxidized starches) and sugar alcohols such as maltitol.

The barrier material may comprise a coloring agent which renders easier the location of the capsule within the aerosol generating device during the manufacturing process of the aerosol generating device. The coloring agent is preferably chosen among colorants and pigments.

The barrier material may further comprise at least one buffer, such as a citrate or phosphate compound.

The barrier material may further comprise at least one plasticizer, which may be glycerol, sorbitol, maltitol, triacetin, polyethylene glycol, propylene glycol or another polyalcohol with plasticizing properties, and optionally one acid of the monoacid, diacid or triacid type, especially citric acid, fumaric acid, malic acid, and the like. The amount of plasticizer ranges from 1% to 30% by weight, preferably from 2% to 15% by weight, and even more preferably from 3 to 10% by weight of the total dry weight of the shell.

The barrier material may also comprise one or more filler materials. Suitable filler materials include comprising starch derivatives such as dextrin, maltodextrin, cyclodextrin (alpha, beta or gamma), or cellulose derivatives such as hydroxypropyl- methylcellulose (HPMC), hydroxypropylcellulose (HPC), methylcellulose (MC), carboxy-methylcellulose (CMC), polyvinyl alcohol, polyols or mixture thereof. Dextrin is a preferred filler. The amount of filler in the shell is at most 98.5%, preferably from 25 to 95% more preferably from 40 to 80% and even more preferably from 50 to 60% by weight on the total dry weight of the shell.

The capsule shell may additionally comprise a hydrophobic outer layer which reduces the susceptibility of the capsule to moisture-induced degradation. The hydrophobic outer layer is suitably selected from the group comprising waxes, especially carnauba wax, candelilla wax or beeswax, carbowax, shellac (in alcoholic or aqueous solution), ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyl- propylcellulose, latex composition, polyvinyl alcohol, or a combination thereof. More preferably, the at least one moisture barrier agent is ethyl cellulose or a mixture of ethyl cellulose and shellac.

The capsule core comprises an aerosol-modifying agent as described previously.

Where the aerosol-modifying agent is a flavorant, the flavorant may suitably be licorice, rose oil, vanilla, lemon oil, orange oil, a mint-flavor, suitably menthol and/or a mint oil from any species of the genus Mentha such as peppermint oil and/or spearmint oil, or lavender, fennel or anise. In some cases, the flavorant comprises menthol.

In some cases, the capsule may comprise at least about 25% w/w flavorant (based on the total weight of the capsule), suitably at least about 30% w/w flavorant, 35% w/w flavorant, 40% w/w flavorant, 45% w/w flavorant or 50% w/w flavorant.

In some cases, the core may comprise at least about 25% w/w flavorant (based on the total weight of the core), suitably at least about 30% w/w flavorant, 35% w/w flavorant, 40% w/w flavorant, 45% w/w flavorant or 50% w/w flavorant. In some cases, the core may comprise less than or equal to about 75% w/w flavorant (based on the total weight of the core), suitably less than or equal to about 65% w/w flavorant, 55% w/w flavorant, or 50% w/w flavorant. Illustratively, the capsule may include an amount of flavorant in the range of 25-75% w/w (based on the total weight of the core), about 35-60% w/w or about 40-55% w/w.

The capsules may include at least about 2 mg, 3 mg or 4 mg of the aerosol-modifying agent, suitably at least about 4.5 mg of the aerosol-modifying agent, 5 mg of the aerosol-modifying agent, 5.5 of mg the aerosol-modifying agent or 6 mg of the aerosol-modifying agent.

In some cases, the capsule comprises at least about 7 mg of the aerosol-modifying agent, suitably at least about 8 mg of the aerosol-modifying agent, 10 mg of the aerosol-modifying agent, 12 mg of the aerosol-modifying agent or 15 mg of the aerosol-modifying agent. The core may also comprise a solvent which dissolves the aerosol-modifying agent. Any suitable solvent may be used.

Where the aerosol-modifying agent comprises a flavorant, the solvent may suitably comprise short or medium chain fats and oils. For example, the solvent may comprise tri-esters of glycerol such as C2-C12 triglycerides, suitably C6-C10 triglycerides or Cs- C12 triglycerides. For example, the solvent may comprise medium chain triglycerides (MCT- C8-C12), which may be derived from palm oil and/or coconut oil.

The esters may be formed with caprylic acid and/or capric acid. For example, the solvent may comprise medium chain triglycerides which are caprylic triglycerides and/or capric tryglycerides. For example, the solvent may comprise compounds identified in the CAS registry by numbers 73398-61-5, 65381-09-1, 85409-09-2. Such medium chain triglycerides are odorless and tasteless.

The hydrophilic-lipophilic balance (HLB) of the solvent may be in the range of 9 to 13, suitably 10 to 12. Methods of making the capsules include co-extrusion, optionally followed by centrifugation and curing and/or drying. The contents of WO 2007/010407 A2 is incorporated by reference, in its entirety.

The delivery device may comprise a filter. The filter may be positioned in a mouthpiece of the delivery device such that filters aerosol generated by the aerosol-generating material during use of the delivery device.

The filter may comprise a body of material. The body of material may comprise filamentary tow. The filamentary tow material described herein can comprise cellulose acetate fiber tow. The filamentary tow can also be formed using other materials used to form fibers, such as polyvinyl alcohol (PVOH), polylactic acid (PLA), polycaprolactone (PCL), poly(l-4 butanediol succinate) (PBS), poly(butylene adipate-co-terephthalate)(PBAT), starch based materials, cotton, aliphatic polyester materials and polysaccharide polymers or a combination thereof. The filamentary tow may be plasticized with a suitable plasticizer for the tow, such as triacetin where the material is cellulose acetate tow, or the tow may be non- plasticized. The tow can have any suitable specification, such as fibers having a ‘Y’ shaped or other cross section such as ‘X’ shaped, filamentary denier values between 2.5 and 15 denier per filament, for example between 8.0 and 11.0 denier per filament and total denier values of 5,000 to 50,000, for example between 10,000 and 40,000.

The filter can comprise a body of material comprising a capsule. The capsule can be manufactured and inserted into the filter using existing processes and machinery.

FIG. 3 is a schematic illustration of a combustible aerosol provision system 1 c. Reference numerals are retained from the embodiment illustrated by FIGS. 1 and 2 as described previously.

The filter 4 comprises a first section 7 a made from absorbent material and a second section 10 at the mouth-end of the filter 4 comprising fibrous filter material 11 formed into a tubular shape and having a channel 12 extending through the center of the filter material 11. The empty or hollow channel 12 extending through the center of the filter material 11 can be from lmm to 6 mm in diameter, for instance from 2 mm to 5 mm in diameter. The channel 12 extending through the center of the filter material 11 is, in the present example, an empty, hollow passageway. The channel, in some embodiments, extends through an axial region of the filter material of the second filter section 10. The axial region of the second filter section 10 is a region, in the present example, centered on the axis ‘a’ of the smoking article 1, having a radius of about 2.5 mm. In alternative embodiments, the radius of the axial region can be anywhere from lmm to 4 mm, or from lmm to 3 mm, or about 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm. In the present example, the tubular filter section is formed from cellulose acetate tow and is wrapped in a second plug wrap 13. The wall thickness of the tubular filter is about 1.5 mm. In alternative embodiments, the wall thickness can be anywhere from 1 mm to 4 mm, or from 1 mm to 3 mm, or about 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm. However, the specific dimensions may be selected based on the density of filter material forming the tube and the level of plasticizer applied to the material, to result in a tube having the desired rigidity, porosity or other characteristics. The tubular filter section 10 can be manufactured using existing processes and machinery.

When the consumer breaks the capsule 9 either prior to or in the course of smoking the smoking article 1 c, the aerosol-modifying agent contained therein, in the present case menthol, is released in greater concentration into the axial region of the first filter section 7 a through which an increased flow of mainstream smoke is directed, as a result of the second filter section 10. Accordingly, the increased flow of mainstream smoke enhances the delivery of the smoke modifying additive to the consumer and the smoking article 1 c can therefore exhibit improved delivery of a smoke modifying additive to a consumer compared to conventional smoking articles.

According to a further aspect of the disclosure, there is provided a packet containing a delivery system as described herein. The packet may comprise an opening arranged to allow the removal of the one or more delivery systems from the packet. The one or more delivery systems are arranged such that the aerosol-generating material is visible to a user through the opening prior to removal of the one or more delivery systems from the packet through the opening.

According to a further aspect of the disclosure, there is provided a packet containing a delivery system as described herein. The packet may comprise an opening arranged to allow the removal of the one or more delivery systems from the packet. The one or more delivery systems are arranged such that the aerosol-generating material is visible to a user through the opening prior to removal of the one or more delivery systems from the packet through the opening.

The various embodiments described herein are presented only to assist in understanding and teaching the claimed features. These embodiments are provided as a representative sample of embodiments only, and are not exhaustive and/or exclusive. It is to be understood that advantages, embodiments, examples, functions, features, structures, and/or other aspects described herein are not to be considered limitations on the scope of the invention as defined by the claims or limitations on equivalents to the claims, and that other embodiments may be utilized and modifications may be made without departing from the scope of the claimed invention. Various embodiments of the invention may suitably comprise, consist of, or consist essentially of, appropriate combinations of the disclosed elements, components, features, parts, steps, means, etc., other than those specifically described herein. In addition, this disclosure may include other inventions not presently claimed, but which may be claimed in future.

EXAMPLES Example 1

An aerosolizable material was made as follows. Water and sodium alginate (Protanal® RF6650; 8% on a dry weight basis) were combined and mixed in a high-shear mixer for 15 minutes. Chalk (79% on a dry weight basis) and glycerol (13% on a dry weight basis) were added to the mixture and mixed for 5 minutes. The mixture was agitated in a tank until the slurry reached a uniform consistency. The slurry was then cast using a heated band caster (cast width 800 mm; 80 to 90° C., 20 minutes) to produce a wet sheet of about 0.5 mm thickness. The aerosolizable material was then shredded at 37 cuts per inch (about 1.5 cuts per mm) using a shredder to provide a shredded aerosolizable material.

Example 2

The aerosolizable material produced according to Example 1 was blended with tobacco material to produce a tobacco composition comprising tobacco and the aerosolizable material. The relative quantities of aerosolizable material and tobacco material in the tobacco composition are shown in Table 1.

The tobacco composition comprised tobacco leaf in an amount of about 50 wt % based on the total weight of the composition. About 40 wt % of the tobacco leaf was leaf obtained from the lower half of the tobacco plant and had a ratio of sugars to nicotine of about 10:1. The tobacco composition comprised tobacco stem in an amount of about 18 wt % based on the total weight of the composition.

TABLE 1 Tobacco Composition Aerosolizable material (wt %) 37% Tobacco material (wt %) 63%

Example 3

The tobacco composition produced according to Example 2 was made into cigarettes. Cigarettes comprising the tobacco composition may be marketed under the name “White Tobacco”.

Three cigarettes comprising a filter were manufactured using the aerosol-generating material. One cigarette did not comprise any additional flavorants. The other two cigarettes comprised a flavorant (menthol, 1 mg).

The configurations are shown in Table 2.

TABLE 2 Cigarette Flavorant* 1 No 2 Yes (Cranberry) 3 Yes (Cappuccino) *Added to the aerosol-generating material

Sensory Evaluation

The sensory characteristics of Cigarettes 1 to 3 were evaluated by a panel of expert smokers against a Control Cigarette which did not contain the aerosolizable material as described herein (Kent Super Slim (1 mg menthol)).

The panel of expert smokers concluded that, when smoked, Cigarettes 1 to 3 exhibited better aftertaste, better flavor perception and better mouthfeel compared with the Control Cigarette.

The expert smokers reported that Cigarettes 2 and 3 exhibited markedly improved cooling compared with the Control Cigarette, despite the identical levels of menthol flavorant (1 mg). 

1. A tobacco composition comprising tobacco material and an aerosol former material, wherein the tobacco material comprises a leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1, wherein said leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 is present in the tobacco material in an amount of at least 5% by weight of the tobacco material.
 2. A tobacco composition as claimed in claim 1, wherein the tobacco composition comprises nicotine in an amount of between about 1% and about 2.5% by weight of the tobacco composition.
 3. A tobacco composition as claimed in claim 1, wherein the weight ratio of the sugars to nicotine in the leaf tobacco is between about 8:1 and about 15:1.
 4. A tobacco composition as claimed in claim 1, wherein the tobacco material comprises the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 in an amount of between about 30% and about 50% by weight of the tobacco material.
 5. A tobacco composition as claimed in claim 1, wherein the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 comprises the sugars in an amount of between about 5% and about 20% by weight of the leaf tobacco material.
 6. A tobacco composition as claimed in claim 1, wherein the tobacco composition comprises the aerosol-former material in an amount of between about 1% and about 10% by weight of the tobacco composition.
 7. A tobacco composition as claimed in claim 1, wherein the tobacco composition comprises the tobacco material in an amount of between about 20% and about 90% of the tobacco composition.
 8. A tobacco composition as claimed in claim 1, wherein the tobacco composition comprises the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 in an amount of between about 10% and about 60% by weight of the tobacco composition.
 9. A tobacco composition as claimed in claim 1, wherein the tobacco composition comprises an aerosolizable material.
 10. A tobacco composition as claimed in claim 9, wherein the tobacco composition comprises the aerosolizable material in an amount of between about 1% and about 99%, between about 1% and about 50% or between about 30% and about 45% by weight of the tobacco composition.
 11. A tobacco composition as claimed in claim 9, wherein the aerosolizable material comprises a binder.
 12. A tobacco composition as claimed in claim 9, wherein the aerosolizable material comprises an inorganic material.
 13. A tobacco composition comprising a tobacco material and an aerosolizable material, wherein the aerosolizable material comprises an inorganic material, a binder and an aerosol-former material and wherein the tobacco composition comprises the aerosolizable material in an amount of between about 30% and about 45% by weight of the tobacco composition.
 14. A tobacco composition as claimed in claim 9, wherein the aerosolisable material comprises the aerosol-former material in an amount of between about 10% and about 20% by weight of the aerosolizable material.
 15. A tobacco composition as claimed in claim 9, wherein the tobacco composition comprises the aerosolizable material an amount of between about 35% and about 40% by weight of the tobacco composition.
 16. A tobacco composition as claimed in claim 12, wherein the aerosolizable material comprises the inorganic material in an amount of at least about 50% by weight of the aerosolizable material.
 17. A tobacco composition as claimed in claim 9, wherein the aerosolizable material comprises the binder in an amount of at least about 5% by weight of the aerosolizable material.
 18. A tobacco composition as claimed in claim 1, wherein the aerosol-former material is selected from the group consisting of: glycerol, sorbitol, propylene glycol, triethylene glycol, lactic acid, diacetin, triacetin, triethylene glycol diacetate, triethyl citrate, ethyl myristate, isopropyl myristate, methyl stearate, dimethyl dodecanedioate, dimethyl tetradecanedioate, and mixtures thereof.
 19. A tobacco composition as claimed in claim 1, wherein the tobacco material comprises dry ice expanded tobacco material.
 20. A tobacco composition as claimed in claim 1, wherein the leaf tobacco comprising sugars and nicotine in a weight ratio of between about 8:1 and about 20:1 is lower-stalk leaf tobacco.
 21. A tobacco composition as claimed in claim 1, wherein the tobacco material and/or the aerosolizable material is shredded and has a width of between about 0.01 and 1.5 mm.
 22. A tobacco composition as claimed in claim 1, wherein the aerosolizable material does not comprise additional colorants.
 23. A tobacco composition as claimed in claim 1, wherein the tobacco composition comprises a flavor.
 24. A process of manufacturing a tobacco composition as claimed in claim 13, the process comprising: forming a slurry comprising the inorganic material, the binder and an aerosol-former material; drying the slurry to form the aerosolizable material; shredding the aerosolizable material to form a shredded aerosolizable material; and combining the shredded aerosolizable material with the tobacco material.
 25. A delivery device comprising a tobacco composition as claimed in claim
 1. 26. A delivery device as claimed in claim 25, wherein the delivery device comprises an aerosol-modifying agent release component comprising an aerosol modifying agent.
 27. A delivery device as claimed in claim 26, wherein the delivery device comprises a filter material comprising the aerosol-modifying agent release component.
 28. A delivery device according to claim 27, wherein the filter material comprises a filamentary tow or a cellulose based material.
 29. A delivery device as claimed in claim 25, wherein the aerosol-modifying agent release component comprises a breakable capsules containing the aerosol modifying agent.
 30. A delivery device according to claim 29, wherein the capsule comprises a shell and an aerosol modifying agent enclosed within the shell.
 31. A delivery device according to claim 29, wherein the capsule is substantially spherical in shape.
 32. A delivery device according to claim 29, wherein the capsule has a diameter in the range 2 mm to 4 mm.
 33. A delivery device as claimed in claim 26, wherein the aerosol-modifying release component comprises a plurality of breakable capsules containing the aerosol modifying agent.
 34. A delivery device as claimed in claim 33, wherein the aerosol modifying agent in one or more capsule of the plurality of breakable capsules differs from the aerosol modifying agent in another capsule of the plurality of capsules.
 35. A delivery device as claimed in claim 33, wherein the aerosol modifying agent in each capsule of the plurality of capsules is different to the aerosol modifying agent in each of the other capsules of the plurality of capsules.
 36. A delivery device as claimed in claim 33, wherein the aerosol modifying agent in each capsules of the plurality of capsules is identical to the aerosol modifying agent in each of the other capsules of the plurality of capsules.
 37. A delivery device as claimed in claim 26, wherein the aerosol modifying agent is a liquid.
 38. A delivery device as claimed in claim 27, wherein the filamentary tow comprises a total denier in the range 8,000 to 40,000.
 39. A delivery device as claimed in claim 28, wherein the filamentary tow comprises a denier per filament in the range 5 to
 12. 40. A delivery device as claimed in claim 26, wherein the aerosol modifying agent release component is a wrapper comprising the aerosol modifying agent.
 41. Use of a tobacco composition as claimed in claim 1 in a delivery system. 